A) \[1.5\times {{10}^{-2}}m{{s}^{-1}}\]
B) \[2.4\times {{10}^{-2}}m{{s}^{-1}}\]
C) \[0.75\times {{10}^{-2}}m{{s}^{-1}}\]
D) \[25\times {{10}^{-2}}m{{s}^{-1}}\]
E) \[15\times {{10}^{-2}}m{{s}^{-1}}\]
Correct Answer: E
Solution :
Terminal velocity of a single drop, \[v=3.75\text{ }cm{{s}^{-1}}=3.75\times {{10}^{-2}}m{{s}^{-1}}\] Terminal velocity of the big drop \[V={{n}^{2/3}}v={{(8)}^{2/3}}\times 3.75\times {{10}^{-2}}\] \[=4\times 3.75\times {{10}^{-2}}\] \[=15\times {{10}^{-2}}m{{s}^{-1}}\]
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